Can a multimeter be used as a transducer?

Question

To measure pressure, temperarure etc..

Answer 1

If your pressure or temperature can be converted into an electrical property (voltage, current, resistance, capacitance) then yes, it can be measured with a multimeter. You will need to do a calibration and determine the linear-range in which your measurements have an acceptable accuracy. Many multimeters come with thermo-couple probes (measure the Seebeck voltage between two dissimilar metals) and the meter is pre-calibrated to give you a temperature reading at the display. Pressure can be measured by using pressure sensors that consist of a strain gauge on a flexable diaphram. As the pressure changes, the shape of the diaphram will change, and cause the resistance of the strain gauge to change also.

Answer 2

That is good hinking. Actually you can use a multimeter to callibrate or measure changes in a transducer. But the Multimeter cannot be converted into a transducer. A transducer just changes energy from one form to another(one of these being electrical more often than not). But a multimeter does nothin other than to measure the change. However you can use it as a transducer in a limited form like converting the electrical signals to vibrations which I believe a quartz crystal transducer can do far better.

Answer 3

Actually, no. The transducer is the sensor which directly converts the physical phenomenon to an electrical signal, such as a strain gauge or thermocouple.

Some multimeters have inputs for these transducers, but they are not themselves a transducer (unless you manage to find one with a built-in temperature gauge).

The multimeter may act as the signal conditioner (charge amplifier or temperature meter), and some have RS-232 outputs which will allow them to be read from a PC.

The thing is that the actual transducer is a measurement device external to the multimeter, and the multimeter can only provide an interface to the actual transdcuer.

Answer 4

Multimeter cannot act as a Transducer.
It can show the reading of voltage or current into which a particular physical quantity has been converted into by some other transducer.

Answer 5

Unless the DVM is converting the input signal into a RS232 serial output its not meeting the true definition of a Transducer. Changing energy from one form to another:

Speaker - AC signal to electomechanical produced sound
RTD - temperature change to a resistance change (measured by voltage/current)

In a very broad sense the DVM could be considered a transducer
because it is changing whatever input signal is applied into a LCD visual display. But because the DVM is not typically incorporated as permanent part of an electronic circuit nor considered a component like a speaker, RTD or pressure sensor many would not categorize it as a transducer

Answer 6

relies upon upon the fashion of expertise element you have (verify the information sheet). Temperature could be measured using the two an RTD (resistive temperature device) or a Thermocouple. The RTD adjustments its resistance with temperature even as the Thermocouple produces a voltage (Seebeck Voltage) contained in the milli volt variety. tension experience aspects can replace there resistance or capacitance. So a typical DVM will degree resistance yet would possibly no longer have the function to degree capacitance. some tension sensors use a tension gauge to degree deflection of a diaphram. the strain gauge could opt to be conditioned to a usable sign point. Capacitance based experience aspects could have very small adjustments in capacitance throughout the time of their span. (40 to 100pf) you could would desire to build or get carry of a sign conditioner which will output a voltage based upon the capacitance or enhance a small sign voltage from a TC. while you're speaking approximately measuring an commercial temperature or tension transmitter you will desire to understand what the anticipated output in many situations occurring is. Voltage (0 to 5V or 0 to 10Volts) cutting-edge 4-20mA, frequency or PWM and finally digital using a serial communique protocol. you may get incorrect consequences in case you degree for the incorrect style of output sign. as an occasion measuring for voltage on a serial or cutting-edge output.

Answer 7

No! a multimeter just displays a measured variable

Answer 8

It can, but only if the signal is somehow converted to one of the functionalities of the meter: resistance, voltage, current...